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tent @itam TREAT T. PRGSSER, OF CHICAGO, ILLINOIS, ASSIGNOR TO HIMSELF,

GEORGE GILLE TT, AND GEORGE H. ROZET.

Letters latent No. 86,034, datedA January 19, 1869.

O'VEMENT IN' SABE-BALANCE.

To all whom it may concer/nr Be it known that I, TREAT T. Pnossnn, of Chicago,- in the county of Cools-and State of Illinois, have invented certain new and useful Improvements in the Method of Constructing and Operating Sash-Weights and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had tothe accompanying drawings, making part of this specification, andto the letters of reference marked thereon, like letters indicating like parts wherever they occur.

To enable others skilled in the art to construct and use my invention, I will proceed to describe it.

'My invention relates to hanging sash, and consists 'in connecting the sash' to weights, of peculiar form and construction, by bands or straps passing over dat pulleys or rollers.

In the drawings- Figure l is a perspective view, with a portion of the casing broken away, to show the arrangement of the weight;

Figure 2 is a txansvelse section of the casing or frame through the centre of the pulleys, showing the strap, passing over one of them, withthe weight attached, and theether with the strap in section, and in red, but without the weight; and

Figure 3 is a longitudinal vertical section oi' the weight, with strap attached.

In the old method, it is customary to attach a cord to eachedge of each sash, at or near the top of the sash, and then to pass its loose end over a sheavepulley, set in the jamb of the casings of the windowframe, and then down into the weight-chamber, and there connect it, by tying, to a weight of cylindrical form, and provided with an eye or hook for that purpose.

When the sash and weight about balance each other,

it is evident that very little force willv be required to.

move the sash, and it would therefore seem of little importance what kind of weights and connections were `used, provided the former balanced the sash, and the latter were strong enough for the purpose; but experience brings to light the fact that, in nearly every house provided with balanced sash, more' or less of .'these sash are inoperative, because of certain derangements caused bythe weights, in untwisting the cord, dac.

The weighigbei ng cylindrical-in form, when attached to and suspended bythe cord, commences to turn, and thusA untwist the cord, destroying at once much of its usefulness and durability; and besides, as the cord rests on the sheave-pulley, the weight ofthe'sash and sashweight prevents it from passing freely over the pulley, and, as the sash is shoved up, the twist is forced into it on the side toward the sash, and it frequently kinks.

"thus preventing its free passage over the pulley, and

oftentimes tearing or breaking it loose from the sash.

The 'weights ordinarily used are solid, as well as cylindrical in form, and, from the great number of them used, have become an extensive and important article of trade.

To obviate the diiculties above described, and at the same time to make and use devices of' simpler construction, and cheaper iu cost, is the object of my invention. l

In doing this, I attach, near the upper ends of the edges of' the sash, B, hands orstraps e, at one end, and pass the other end' up over dat pulleys c, turning on pins j, and then down into the weight-chambers g, behind the casings D, and there connect it to a weight,

H, by passing a small screw or rivet, o, through the slotted end ofthe weight, and an eyelet in the end of the strap, all as clearly shown in iigs. 1' and 2.

The weight H, I make of an oblong rectangular form, by cast-ing iron aboutl a core of sand. This I do b v anchoring or suspending the core J in the centre of the mould, by supports m, and inserting in the end of the core J a small roll of thin metalyn, and pouring the liquid metal about it. i

The supports m hold the core J in position, while the small roll of lrhin metal, n, furnishes an operi passage for the gases, that are generated in the casting, to escape.

The form of the weight H, with its slotted end for attaching the strap e, and with its core J of sand, is clearly shown in fig. 3.

Asl the weight is thus'constructed, there is a saving of metal equal to the weight of the sand, and, when the quantity of weights used is large, it is obvious that there must be a great 'saving of metal. As they are rectanguiar in form, they cannot turn in the weight-charrrbers` if oi corresponding form, and will not, when ,attacheeto ilat braids, bands, or straps e, passing over flat pulleys c. As the weights cannot turn, the straps cannot twist, and 'consequently there can be no jamming, but, on the other hand, everything must run easily and smoothly.

Window-sash can not only be hung cheaper by these Idevices, arranged as described, but, when once so hung, will continue to operate readily and easily till worn out.

' lHaving thus described my invention,

`1. A. hanging for sash consisting of' a dat strap, o, passing over a smooth roller, c, with the weight H attached, constructed and arranged to operate substantially as herein described.

2. The method of constructing the weight H,wth a core of sand, and of attaching it to the strap e, Bubstantially as herein described .and for the purpose est` forth.

TREAT T. PROSSER.

Witnesses:

P. A. Hymn,

A. T. SHERMAN. 

